Objective:
Lets create an example for Spring DAO using jnidiTemplate.
1) Start the Hypersonic SQL DB &
Create the "contacts" table in Hypersonic SQL
Refer to the following for creating
the table in Hypersonic SQL -
3) Create the Java Components:
a)Create the Model: Contact.java
package com.dct.phonebook.model;
public class Contact {
private String name;
private int phone;
public Contact(String name, int phone){
this.name = name;
this.phone = phone;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getPhone() {
return phone;
}
public void setPhone(int phone) {
this.phone = phone;
}
}
b)Create the DAO contract(interface): ContactsDAO.java
package
com.dct.phonebook.dao;
import com.dct.phonebook.model.Contact;
public interface ContactsDAO {
public void addContact(final Contact contact) throws Exception;
}
c)Create the implementation for the contract:
ContactsDAOImpl.java
package
com.dct.phonebook.dao.impl;
import java.sql.Connection;
import javax.sql.DataSource;
import
org.springframework.jdbc.core.JdbcTemplate;
import
com.dct.phonebook.dao.ContactsDAO;
import
com.dct.phonebook.model.Contact;
public class ContactsDAOImpl implements
ContactsDAO {
private
DataSource dataSource;
private
JdbcTemplate jdbcTemplate;
public DataSource
getDataSource() {
return dataSource;
}
public void
setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
public void addContact(final Contact contact) throws Exception {
Connection conn =
null;
try{
String sql = "insert into contacts(name,phone)
values(?,?)";
jdbcTemplate = new JdbcTemplate(dataSource);
jdbcTemplate.update(sql, new
Object[]{contact.getName(), contact.getPhone()});
} catch(Exception e){
throw e;
} finally {
if(conn!=null){
try{
conn.close();
} catch(Exception e){
throw e;
}
}
}
}
}
d)Create the Spring configuration files:
- Configure the dataSource : spring-datasource.xml
<?xml
version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean
id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property
name="driverClassName" value="org.hsqldb.jdbcDriver" />
<property
name="url" value="jdbc:hsqldb:http://localhost/phonebook"/>
<property
name="username" value="SA"
/>
<property
name="password" value=""
/>
</bean>
</beans>
- Configure the Model: spring-model.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean
id="contactsDAO" class="com.dct.phonebook.dao.impl.ContactsDAOImpl">
<property
name="dataSource" ref="dataSource" />
</bean>
</beans>
- Create the Application Context file: spring-phonebook.xml
<?xml version="1.0"
encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<import
resource="datasource/spring-datasource.xml" />
<import
resource="model/spring-model.xml" />
</beans>
e) Create the test class for testing this application: Phonebook.java
package
com.dct.phonebook;
import
org.springframework.context.ApplicationContext;
import
org.springframework.context.support.ClassPathXmlApplicationContext;
import com.dct.phonebook.dao.ContactsDAO;
import
com.dct.phonebook.model.Contact;
public class Phonebook {
public static void main(String[] args) throws Exception {
ApplicationContext context =
new ClassPathXmlApplicationContext("resources/spring-Phonebook.xml");
ContactsDAO
contactsDAO = (ContactsDAO) context.getBean("contactsDAO");
Contact contact = new Contact("renganath",
97890);
contactsDAO.addContact(contact);
}
}
The folder structure of the final
application is:
